ES: Water

What is Eutrophication?

• over long periods of time, nutrients can build up in a lake
• As lake organisms die, bacteria break down the bodies and release nutrients into the water 
• This process can change a lake - algae layers can become so thick that it blocks out sunlight and plants in the lake die 
• All of the Above

Toxins often appear at higher concentrations in higher trophic levels due to...

• bioaccumulation
• biomagnification
• bionicle
• bioengineering

Water pollution that comes from many sources is considered...

• point source pollution
• nonpoint source pollution
• thermal pollution
• ocean pollution

Fertilizer, sewage, and animal feces can wash in to water, leading to... 

• thermal pollution
• artificial eutrophication
• desalination
• biomagnification

Water pollution that comes from a single source is considered...

• point source pollution
• nonpoint source pollution
• thermal pollution
• ocean pollution

Any substance that has a negative effect on water or the living things that depend on the water. 

• water pollution
• trash
• air pollution
• sewage

Our soil is permeable, this means it...

• can me shaped and molded into a new structure
• does not allow anything to pass through it
• allowing liquids or gases to pass through it.
• causes all drinking water to be clean

What is a watershed?

• Land that collects and channels water froma small body of water to a larger body of water
• the shape of the land determined by elevation
• A natural stream of water of considerable  volume
• a river and all its tributaries

A industrial powerplant dumps its heated wastewater straight from a pipe into a stream. This is an example of -

• eutrophic pollution
  over-treated drinking water.
• riparian pollution
  flooding in the local aquifer.
• point source pollution.
• nonpointsource pollution.

Why is gravity a factor in watersheds? 

• it causes the water to flow away from a watershed
• it causes the water to flow down towards a watershed